Wortmannin in an antifungal antibiotic that can be isolated and purified from the culture broth of the fungi Penicillium Wortmanii and Penicillium Fumiculosum. It has no antibacterial properties, but is specifically active against fungi.

In mammals (humans included), wortmannin displays anti-inflammatory and anti-fungal activity, but also acuty toxicity, so it currently has no therapeutic purposes. In rats, it is toxic at 7 mg/kg body weight.

Physical properties:
White-yellow crystalline powder
Molecular formula: C₂₃H₂₄O₈
Molecular weight: 428.44
Melting point: 240°C